1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "pmtest64 native.cpp"
18#include <android/log.h>
19
20#include <stdio.h>
21
22#include "jni.h"
23
24#define ALOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
25#define ALOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
26
27static jint
28add(JNIEnv */* env */, jobject /* thiz */, jint a, jint b) {
29int result = a + b;
30    ALOGI("%d + %d = %d", a, b, result);
31    return result;
32}
33
34static const char *classPathName = "com/framework/shareduid/bit64/Native";
35
36static const JNINativeMethod methods[] = {
37  {"add", "(II)I", (void*)add },
38};
39
40/*
41 * Register several native methods for one class.
42 */
43static int registerNativeMethods(JNIEnv* env, const char* className,
44    const JNINativeMethod* gMethods, int numMethods)
45{
46    jclass clazz;
47
48    clazz = env->FindClass(className);
49    if (clazz == NULL) {
50        ALOGE("Native registration unable to find class '%s'", className);
51        return JNI_FALSE;
52    }
53    if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
54        ALOGE("RegisterNatives failed for '%s'", className);
55        return JNI_FALSE;
56    }
57
58    return JNI_TRUE;
59}
60
61/*
62 * Register native methods for all classes we know about.
63 *
64 * returns JNI_TRUE on success.
65 */
66static int registerNatives(JNIEnv* env)
67{
68  if (!registerNativeMethods(env, classPathName,
69                 methods, sizeof(methods) / sizeof(methods[0]))) {
70    return JNI_FALSE;
71  }
72
73  return JNI_TRUE;
74}
75
76
77// ----------------------------------------------------------------------------
78
79/*
80 * This is called by the VM when the shared library is first loaded.
81 */
82
83typedef union {
84    JNIEnv* env;
85    void* venv;
86} UnionJNIEnvToVoid;
87
88jint JNI_OnLoad(JavaVM* vm, void* /* reserved */)
89{
90    UnionJNIEnvToVoid uenv;
91    uenv.venv = NULL;
92    jint result = -1;
93    JNIEnv* env = NULL;
94
95    ALOGI("JNI_OnLoad");
96
97    if (vm->GetEnv(&uenv.venv, JNI_VERSION_1_4) != JNI_OK) {
98        ALOGE("ERROR: GetEnv failed");
99        goto bail;
100    }
101    env = uenv.env;
102
103    if (registerNatives(env) != JNI_TRUE) {
104        ALOGE("ERROR: registerNatives failed");
105        goto bail;
106    }
107
108    result = JNI_VERSION_1_4;
109
110bail:
111    return result;
112}
113